certificate said 97.4 and the independent came back 99, is that a problem
Thread · #test-results · 2026-05-19
anyone had a result they think was a lab
Spun off from a message in #test-results on 2026-05-19. 17 messages, 4 participants.
The message this came from
- batch_bandit — anyone had a result they think was a lab error rather than a bad vial the results in this channel skew because people test when they are suspicious. that is selection bias and it is real 21:22
attach the pdf
a single sample tells you about a single vial. that is genuinely all it tells you
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weigh the vial before you reconstitute. it costs nothing and catches the common failure
the honest limits: hobby chain of custody is weak and any result here should be read with that in mind
log the boring ones
update from 25 months ago: retested the same supplier, result came back better, logged both
my sheet has 9 lots from SGN with a spread under a point, which is tight
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a point or two between the certificate and an independent result is inside what two labs disagree by
whats the underfill rate people are actually seeing
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if the vial has been through a bad transit you are testing the transit as much as the supplier
is it worth testing if the vial has already been through a warm transit
weigh the vial before you reconstitute. it costs nothing and catches the common failure
one data point
whats the underfill rate people are actually seeing
a point or two between the certificate and an independent result is inside what two labs disagree by